Molekula
Thorin
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Thorin is a sodium salt of an arsenic-containing organic compound used in specialized chemical research and industrial applications. It serves as an indicator in analytical chemistry, notably for sulfate microtitration and for determining barium, beryllium, lithium, uranium and thorium compounds. It is a crystalline solid with a molecular weight of 576.30 g/mol, identified by the CAS number 3688-92-4 and the molecular formula C16H11AsN2Na2O10S2. It should be stored at ambient temperatures and handled with caution due to its signal word "Danger." Molekula supplies Thorin from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
-
1 g — $147.70 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Yellow to deep red solid |
| pH | 6.0 – 6.2 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 12952521 |
| CAS Number | 3688-92-4 |
| IUPAC Name | disodium;4-[(2-arsonophenyl)diazenyl]-3-hydroxynaphthalene-2,7-disulfonate |
| EC Number | 222-993-1 |
| Molecular Formula | C16H11AsN2Na2O10S2 |
| Molecular Weight | 576.30 |
| Exact Mass | 575.8866 |
| SMILES | C1=CC=C(C(=C1)N=NC2=C3C=CC(=CC3=CC(=C2O)S(=O)(=O)[O-])S(=O)(=O)[O-])[As](=O)(O)O.[Na+].[Na+] |
| InChIKey | DCSRPHQBFSYJNN-UHFFFAOYSA-L |
| InChI | InChI=1S/C16H13AsN2O10S2.2Na/c20-16-14(31(27,28)29)8-9-7-10(30(24,25)26)5-6-11(9)15(16)19-18-13-4-2-1-3-12(13)17(21,22)23;;/h1-8,20H,(H2,21,22,23)(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2 |
| PubChem CID | 77269 |
| UN Number | UN3465 |
| REACH Code | Y110 |
| HTS Code | 29319030 |
| Tariff Code | 2931900090 |
Safety & GHS
-
Toxic
GHS06
-
Hazardous to the Environment
GHS09
Hazard statements
- H301 + H331 Toxic if swallowed or inhaled
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P284 Wear respiratory protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P304+312 IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 2,7Naphthalenedisulfonic acid, 4((2arsonophenyl)azo)3hydroxy
- 2,7Naphthalenedisulfonic acid, 4(2(2arsonophenyl)diazenyl)3hydroxy
- 2,7Naphthalenedisulfonic acid, 4(2arsonophenyl)azo3hydro
- 4-((2-Arsonophenyl)azo)-3-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt
- 4((2Arsonophenyl)azo)3hydroxy2,7naphthalenedisulfonic acid
- 4((2Arsonophenyl)azo)3hydroxynaphthalene2,7disulphonic acid
- APANS
- Disodium 4-((o-arsonophenyl)azo)-3-hydroxynaphthalene-2,7-disulphonate
- Thorin I, Indicator Grade
- Thoron(ol)
Frequently asked questions
What is Thorin used for?
Thorin is used as a reagent in analytical chemistry, particularly in the detection and quantification of certain metal ions.
What is the chemical formula and molecular weight of Thorin?
The formula is C16H11AsN2Na2O10S2 with a molecular weight of 576.30 g/mol.
How should Thorin be stored?
Thorin should be stored at ambient temperature, protected from moisture and light.
What grade of Thorin is available?
Thorin is available in analytical grade for laboratory use.
Can Molekula supply Thorin in bulk?
Yes, Molekula can supply Thorin in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a Thorin order?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) compliant with GHS standards.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.